javax.servlet.forward AND javax.servlet.include

[Manikandan Jayaraman]

The forwarded-to servlet and the included servlet has access to 5 request attributes each.

javax.servlet.forward.request_uri
javax.servlet.forward.context_path
javax.servlet.forward.servlet_path
javax.servlet.forward.path_info
javax.servlet.forward.query_string

AND

javax.servlet.include.request_uri
javax.servlet.include.context_path
javax.servlet.include.servlet_path
javax.servlet.include.path_info
javax.servlet.include.query_string

Can I have an example with values for all these request attributes? Thanks in advance.

[Niranjan Deshpande]

Can I have an example with values for all these request attributes? Thanks in advance.

In the destination servlet, just make a meryod call -

request.getAttribute(".............");
you can replace the dots by any of the attributes above.
the only condition is, the disptcher with which you forward the request,
must be obtained as -

request.getRequestDispatcher( ) or
getServletContext().getRequestDispatcher( )

the above attributes are not set if you use the getNamedDispatcher( ).

htht

[Manikandan Jayaraman]

Hi All,

My example's output alone for your quick reference!

What was done?
Forwarder.jsp simply forwards the request to Forwarded.jsp.
Forwarded.jsp also includes response from Included.jsp
All 3 JSPs in the same folder.

My request url
http://localhost:9090/mani-examples/jsp/Forwarder.jsp?name="Mani"

Output of Forwarded.jsp

javax.servlet.forward.request_uri = /mani-examples/jsp/Forwarder.jsp
javax.servlet.forward.servlet_path = /jsp/Forwarder.jsp
javax.servlet.forward.context_path = /mani-examples
javax.servlet.forward.path_info = null
javax.servlet.forward.query_string = name="Mani"

Output of Included.jsp
javax.servlet.include.request_uri = /mani-examples/jsp/Included.jsp
javax.servlet.include.servlet_path = /jsp/Included.jsp
javax.servlet.include.context_path = /mani-examples
javax.servlet.include.path_info = null
javax.servlet.include.query_string = null


Things to Note

1. Query String parameter reflects the query string of the forwarding page.
2. Where as, request_uri, servlet_path, context_path reflect the information of the forwarded page.

Can someone explain the path_info ?

[Manikandan Jayaraman]

Can anyone explain me, what will be contained in path_info. I understood all the other attributes.

How to demonstrate path_info attribute?

[varigireddy reddy]

check this for all the values

http://myj2eelearnings.blogspot.com/2010/06/javaxservletforward-and.html

[Frits Walraven]

Hi Manikandan,

Query String parameter reflects the query string of the forwarding page.

Not exactly: all the attributes reflect information of the forwarding page.

With the include attributes it is the other way around: they reflect information about the included page instead of the including page.

Regards,
Frits